import hirondelle.date4j.DateTime; public class DateExample { public static void main(String[] args) { DateTime date1 = DateTime.forDateOnly(2022, 1, 1); DateTime date2 = DateTime.forDateOnly(2022, 12, 31); if (date1.isBefore(date2)) { } DateTime futureDate = date1.plusDays(7); DateTime parsedDate = DateTime.forPattern("YYYY-MM-DD").parse("2022-05-01"); DateTime switchedDate = date1.switchTimeZone("America/New_York"); int diffDays = date1.numDaysFrom(date2); } }